One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,11)(3,7,8,15)(4,13,14,12)(5,10,16,9)(18,24)(19,29)(20,33)(21,23)(25,30)(27,28)(31,45)(34,38)(35,36)(40,42)(43,46)(44,47)(1,3)(2,7)(4,10)(5,12)(6,8)(9,14)(11,15)(13,16)(17,18)(19,30)(20,34)(21,27)(22,28)(23,24)(25,32)(26,35)(29,42)(31,39)(33,41)(36,38)(37,40)(43,48)(44,45)(46,47) involution — undirected(1,4,6,14)(2,8,11,3)(5,15,16,7)(9,12,10,13)(17,19,22,29)(18,25,28,40)(20,31,36,43)(21,32,23,37)(24,30,27,42)(26,39,41,48)(33,46,35,45)(34,47,38,44)(1,3)(2,4)(5,13)(6,8)(7,10)(9,15)(11,14)(12,16)(17,20)(18,26)(19,31)(21,33)(22,36)(23,35)(24,38)(25,39)(27,34)(28,41)(29,43)(30,44)(32,46)(37,45)(40,48)(42,47) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.